Blood pressure measurement device

Abstract

A blood pressure measurement device includes a curler, a cuff structure on an inner surface of the curler, a case including a tubular shaped outer case and a rear cover fixed to an end portion on a living body side of the outer case and the curler, a portion of the rear cover facing the curler being open, and the rear cover and curler covering the end portion on the living body side of the outer case, a base portion housed in the case, a first sealing member between the rear cover and the curler, that is configured to seal between the rear cover and the curler, and a second sealing member having a higher sealing property than the first sealing member, between an inner circumferential surface of the outer case and the base portion, that is configured to seal between the inner circumferential surface and the base portion.

1 . A blood pressure measurement device attachable to a living body, comprising:
 a curler;   a cuff disposed on an inner surface of the curler;   a case including an outer case having a tubular shape and a rear cover fixed to an end portion on a living body side of the outer case and the curler, a portion of the rear cover facing the curler being open, and the rear cover covering, together with the curler, the end portion on the living body side of the outer case;   a base portion housed in the case;   a first sealing member provided between the rear cover and the curler, the first sealing member being configured to seal between the rear cover and the curler; and   a second sealing member provided between an inner circumferential surface of the outer case and the base portion, the second sealing member being constituted in an annular shape that seals between the inner circumferential surface and the base portion and seals between the rear cover and the base portion, and the second sealing member having a higher sealing property than the first sealing member.   
     
     
         2 . The blood pressure measurement device according to  claim 1 , wherein
 the outer case includes a first abutting portion; and   the base portion includes a second abutting portion configured to abut on the first abutting portion in an axial direction of the outer case.   
     
     
         3 . The blood pressure measurement device according to  claim 1 , wherein the first sealing member is constituted by a double-sided tape. 
     
     
         4 . The blood pressure measurement device according to  claim 1 , wherein the second sealing member is integrally formed with the base portion. 
     
     
         5 . The blood pressure measurement device according to  claim 1 , wherein the second sealing member in a pre-deformation state is formed with an intermediate portion, in an axial direction of the outer case, of an outer circumferential surface of the second sealing member having a larger diameter than other portions. 
     
     
         6 . The blood pressure measurement device according to  claim 1 , wherein an outer circumferential surface of the base portion includes an annular protrusion portion disposed inside the second sealing member and protruding toward an inner circumferential surface of the outer case. 
     
     
         7 . The blood pressure measurement device according to  claim 1 , wherein an intermediate portion in a radial direction of an end surface on the living body side of the second sealing member protrudes further to the living body side than an end on the living body side of the outer case, in a state before the rear cover is fixed to the case.